In view of the worsening environment, the local government is seeking advice from Professor Smith, who is an expert ______ it.
| A．within | B．for | C．on | D．beyond |
People just wonder ________ that makes the housing price so high.
| A．what it is | B．what is it | C．why it does | D．Why does it |
Jackie would like to buy an iphone 5 but _____ was available from that shop.
| A．none | B．nothing | C．no one | D．neither |
Before I left home, my mother taught me ________some simple dishes, such as noodles and garlic with vegetables.
| A．what cooking | B．how cooking | C．what to cook | D．how to cook |
In order to find the missing boy, the young couple all they can over the past twenty-four hours.
| A．do | B．did | C．have been doing | D．had done |
The young manager is well known for his problem-solving skills, ________ is important for a successful leader.
| A．it | B．that | C．what | D．which |